











🔧 Tiny but mighty – grease like a pro, no space too tight!
The OKYOUK World's Smallest Grease Gun Coupler is a precision-engineered, ultra-compact tool designed for high-pressure lubrication tasks. Measuring only 0.53 inches in diameter, it fits recessed Zerks and tight spaces with ease. Built from galvanized carbon steel and reinforced with a patented 6-claw locking system, it reliably handles pressures up to 12500 PSI without leakage. Compatible with all standard 1/8" NPT grease guns—manual, electric, or pneumatic—this coupler is perfect for automotive, agricultural, and industrial maintenance. It also includes a grease nozzle Zerk cleaning tool, making it an all-in-one solution for professionals who demand efficiency and durability.




| Manufacturer | OKYOUK |
| Brand | OKYOUK |
| Model | OKYK-011 |
| Item Weight | 3.87 ounces |
| Product Dimensions | 4.2 x 1.65 x 0.67 inches |
| Item model number | OKYK-01 |
| Manufacturer Part Number | OKYK-011 |
R**M
Works perfect.
Received as described. works great.
P**K
Slim enough to fit, tight enough to transfer the grease perfectly.
Was having difficulty getting at my drive train zerks on my 2nd gen tacoma.This grease coupler is excellent! Slim enough to fit, tight enough to transfer the grease perfectly.My old one is in the can!!
R**D
Good but not for clogs
Slim design fits tight spaces, decent attachments. The mekanism that grabs the grease fitting will break if used on a clogged fitting, works great otherwise. I ordered a 2nd one of these to replace the one that broke. Use something else for clogs.
J**B
Absolutely Worth It
Original coupler from my 20 year old made in India Harbor Freight grease gun measured in at .588”, this one measured in at .537”.My old couplers teeth were worn out and the inner bushing was broken. Making greasing impossible. This new coupler definitely is smaller in diameter. The jaw extend out, and a little pressure it slips on the fitting. I just rebuilt two drive shafts, and greasing the U-joints was a breeze. Definitely recommend, saved me time, frustration, and a cleaner grease job.
D**L
wow, I really needed this
I needed a low profile grease connector that locked on, this delivers in both aspects. I got into the hard to reach areas and I am now able to use grease adapters like needles without leaking. I need to buy another one for a different gun
E**N
This grease coupler constantly pops off, comes apart, makes a mess
This grease coupler is a great Idea that DOESN'T work in most conditions. If you got a perfect grease zert in ideal conditions may work ok sometimes but the reality is if it is not perfectly locked on straight (which requires a LOT of pushing force while depressing the lever) then it will hold until it gets pressure behind it, then pop off and make a mess, most of the time the little lever will come unlatched from the mechanism and is very difficult to put back together. In the course of greasing one little excavator it popped off 7 times, came apart 3 times and resulted in being covered in grease with 2 blood blisters from trying to put it back together every time it came apart. This coupler is in the trash now, they need to go back to the drawing board with this one.
J**.
Great all inclusive kit
This is just a great kit for anyone that has a vehicle that still has grease fittings. I work on a lot of classics and this is an invaluable tool for routine maintenance.
S**D
The release did not open enough to attach to a fitting
The release lever doesn’t pull the locking sleeve back fat enough to release the jaws so they can attach onto a fitting. I had to disassemble the unit, remove the locking collar and grind about 3/16” off of it so that the jaws could open enough to fit over a grease zerk. Now that it’s found down it works amazing. But there was clearly no QC done before rolling this product out, that’s a huge mistake to have a product with one purpose, not even be able to do the one thing it’s replacing a part to accomplish. Thankfully I had a bench grinder and the common sense to fix it. Easy enough fix… but it should have never had to be fixed before it was even usable… the pictures show the fixed version, but when closed the collar was 1/8” above the locking jaws, when open the collar was just 1/16” below the locking jaws leaving them unable to open, so cutting 3/16” pulls it beyond the wide part of the jaws as the picture shows. Took two stars off because I had to fix it. Otherwise it is now an excellent product. Came with other adapters too.
Trustpilot
1 month ago
2 weeks ago